Morningstar Prostar 25Amp PS-MPPT-25, Charge Controller 12/24 Volt (Without Meter) The new Prostar PS-MPPT-25 (without meter) from Morningstar Corp is a 25Amp MMPT mid-range solar charge controller. It enables maximizes your energy harvest by using TrakStar MPPT Technology to determine and adjust to the true maximum power point as insulation changes throughout the day.With accurate control & measurement it can be use for both professional and consumer applications. It protect PV module, battery & load against short circuit & overloading. The Prostar PS-30M sets new standards for reliability and self-diagnostics. This second generation Prostar provides longer battery life and improve system performance. The High Strength / Poly carbonate Case and extruded aluminum heat sink signifies top-notch build quality. Features & Benefits : Auto-battery-select – 12V and 24V systems Transient Surge Protection- 4500 Watts (solar, battery, load) 3-position battery select: gel, sealed or flooded Current compensated low voltage disconnect (LVD) Enabled MODBUS Communications 4-Stage Charging: Bulk, Absorption, Float, Equalize Auto-disconnect on high voltage & high current Lighting & transient surge protection Estimate life: 15 Years Min. Voltage to operate: 8V Self Consumption: 31mA Operating Temperature(degree Celsius): -40 to +60